SU108012A1 - Joint of elements of precast concrete columns without centering gaskets - Google Patents

Description

The invention relates to devices for the joining of elements of precast concrete columns for industrial buildings and structures, for multi-storey residential buildings.

In the manufacture and installation of prefabricated reinforced concrete columns, it is possible to tilt the ends of the abutting elements, therefore, when they are mounted, the small joints in the joints of 100 x 100 mm in size are installed, centering the gasket between the abutting ends.

The disadvantage of the joint with the centering gaskets is that the main part of the areas of the joined ends does not come into mutual contact, and this joint structure weakens the strength of the column at the interface.

In order to eliminate this drawback, it is proposed to make the device of the junction of prefabricated reinforced concrete columns without centering pads with full support of the joined ends of the column elements.

With the device of the proposed joint design, all normal force is transmitted directly from

concrete one plane to concrete second plane.

The joint of elements of precast concrete columns is carried out in two versions: the first option is a joint without a metal cage, with only the angular longitudinal reinforcement of the column being joined by overlays made of round steel (Fig. 1); the second variant is a joint through clamps made of steel strip, cross section. 8-12X100-150 mm (Fig. 2).

Figs, 1 and 2 show the lower element of the column /, the upper element of the column 2, the working reinforcement of the column 3, the transverse mesh 4.

In addition, in FIG. 1 shows a butt pad of angular working reinforcement 5 and in FIG. 2 - metal clip 6 and butt welding 7.

In order to provide a joint, two options are offered for exact cutting of the joint of elements:

a) in the first embodiment, the column is made on a stand in solid formwork for its entire length and is divided into individual elements with planed metal

gaskets installed in the form. The working armature at the joints is cut;

b) according to the second embodiment, the primerzoBka is produced by simultaneously cutting through the ends of the two elements.

When demounting, all elements of the columns are strictly marked.

It should be noted that when tacking, the exact perpendicularity of the joint plane to the longitudinal axis of the column may not be respected.

The peculiarity of the junction of precast concrete columns without centering pads is their straightness, which ensures an accurate alignment of the longitudinal axes of all elements of the column.

Subject invention

Claims (3)

1. Joint of elements of precast reinforced concrete columns without centering gaskets with obligatory welding when mounting the ends of the working reinforcement of adjacent elements, characterized in that the connecting ends of the elements have straight, strictly parallel planes. 2. The implementation of the joint under item 1, characterized in that to ensure the parallelism of each contiguous bunks of the ends of the elements, the column is made on a stand in a removable formwork with installation at the joints of transverse partitions of planed steel plates. 3 .. The form for carrying out the parallelism of the ends of the joint according to claim 2, wherein the twitching is performed by simultaneous cutting (in one pass) of the two ends of the elements to be connected.